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[1]WANG Mengxue,ZHANG Zhongxue,Lü Chunbo,et al.CH4 and N2O Emissions from Rice Paddy Field and Their GWPs Research in Different Irrigation Modes in Cold Region[J].Research of Soil and Water Conservation,2016,23(02):95-100.

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CH₄ and N₂O Emissions from Rice Paddy Field and Their GWPs Research in Different Irrigation Modes in Cold Region

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 23 Number of periods: 2016 02 Page number: 95-100 Column: Public date: 2016-04-28

Title:: CH₄ and N₂O Emissions from Rice Paddy Field and Their GWPs Research in Different Irrigation Modes in Cold Region

Author(s):: WANG Mengxue^1,2, ZHANG Zhongxue¹, Lü Chunbo³, LIN Yanyu¹; 1. College of Water Conservancy and Architecture, Agricultural Key Laboratory of Efficient Utilization of Water Resources of Agriculture Ministry in Northeast Agricultural University, Harbin 150030, China;
2. Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, China;
3. Water Conservancy Management Center of Heilongjiang, Harbin 150001, China

Keywords:: irrigation mode; CH₄ emission; N₂O emission; emission flux; global warming potentials

CLC:: S274.3

DOI:: -

Abstract:: CH₄ and N₂O emission fluxes were measured in rice paddy field of cold region in Heilongjiang under four moisture management modes by using the method of static chamber-gas chromatograph technique. Four different treatment methods including control irrigation, wet irrigation, intermittent irrigation and flood irrigation were utilized in order to study the CH₄ and N₂O emission characteristics. The results indicated that the CH₄ and N₂O emission peak appeared in the rice vigorous growth period and the emissions reduced in leisure period no matter what kind of irrigation methods were utilized. Compared with flood irrigation, the CH₄ emission of wet irrigation decreased by 27.2%,the CH₄ emission of control irrigation decreased by 34%, and intermittent irrigation model significantly decreased by 48.2%. Flood irrigation paddy N₂O emissions reduced 0.41 kg/hm² compared to the intermittent irrigation paddy fields, increased 0.38 kg/hm² compared to control irrigation and increased 0.37 kg/hm² compared to wet irrigation paddy. With respect to analyzing overall greenhouse effect, water saving irrigation mode can effectively decrease and control CH₄ and N₂O emissions. At rice growth stages, N₂O emissions increased accordingly in the period of CH₄ emissions reduction. By considering the relationship of the growth and decline between CH₄ and N₂O emissions, the paddy fields of greenhouse gas emissions can be effectively slowed down.

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